What challenges exist when an IMM won't engage or empower a character that needs empowerment if that character seeks out another in the sphere?

..before you roll your character.

'Hello IMMORTAL X, I was thinking about following you and was just wondering if you've been active lately and are interested in followers? If so what is the best time to catch you within the next couple of weeks? Thanks in advance!'

Your issue is moot at that point.

Empowerment is pretty no nonsense and easy to get, you just have to be patient and realize the dude or lady you are following is a ####ing human in real life and is indeed NOT an omnipotent being of another world.